$3x+7\ge\:-3+5x$
$\frac{7}{2a^2}+\frac{9}{3a^3}$
$\:\frac{x^3-2}{x^5+2x^4+x^3}$
$\sqrt[3]{125\sqrt{32\sqrt[3]{8}}}$
$x-25\le3x-5$
$\left(6k^4+5\right)^3$
$4sen^2x-9\cos^2x=0$
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